Effective Area
|
The area
(in sq inches) of the filter element that is exposed to the flow of air or
fluid for effective filtering |
Efficiency
|
Any reference to efficiency must be accompanied by a qualifying
statement which identifies the efficiency under consideration, as in the
following definitions of efficiency: |
Efficiency, Compression
|
Ratio of the theoretical work requirement to the
actual work required to be performed on the gas for compression and delivery. |
Efficiency, Filtration
|
Ability of a filter to remove particle matter from an air stream. Measured
by comparing concentrate of material upstream and downstream of the filter.
Typical particulate sizes range from .3 micron to 50 micron. |
Efficiency, Isothermal
|
Ratio of the theoretical work (as calculated on a
isothermal basis) to the actual work transferred to a gas during
compression. |
Efficiency, Mechanical
|
Ratio of the thermodynamic work requirement in the
cylinder to actual brake horsepower requirement. |
Efficiency, Polytropic
|
Ratio of the polytropic compression energy
transferred to the gas, to the actual energy transferred to the gas.
|
| Efficiency Volumetric |
Ratio of actual capacity to piston displacement,
stated as a percentage. |
| Ejector Compressor |
A
compressor belonging to the group of dynamic compressors. |
Element
|
The medium or
material that does the actual filtering or separating. May be paper, wire
mesh, special cellulose, inorganic plastic, or a combination. |
| Emulsibility |
The ability
of a non-water-soluble fluid to form an emulsion with water. |
Emulsifier
|
An additive that promotes the formation of a stable mixture, or emulsion, of
oil and water. Common emulsifiers are: metallic soaps, certain animal and
vegetable oils, and various polar compounds. |
Emulsion
|
Intimate
mixture of oil and water, generally of a milky or cloudy appearance.
Emulsions may be of two types: oil-in water (where water is the continuous
phase) and water-in-oil (where water is the discontinuous phase). |
| End Cap |
A ported or
closed cover for the end of a filter element. |
Energy Audit
|
A survey
that shows how much energy you use in your compressed air generation. It
will help find ways to use energy more efficiently. |
| Energy Conservation |
Practices and measures that increase energy efficiency. |
Energy Kinetic
|
The
energy a substance possesses by virtue of its motion or velocity. Used
primarily in calculations for dynamic and ejector type compressors. |
Energy Storage
|
The
ability to convert energy into other forms, such as heat or chemical
reaction, so that it can be retrieved for later use. Also the development,
design, construction and operation of devices for storing energy until
needed. The technology includes devices such as compressed gas. |
Enrichment
|
Addition of oxygen to air to raise combustion efficiency, such as reverberatory furnaces, glass tanks, cupolas, etc. |
| Enthalpy |
The sum of the
internal and external energies. |
Entrainment Ratios
|
Used
with ejectors to convert weight of gas and/or water vapor handled to or from
equivalent air. |
| Entropy |
A measure of the
unavailability of energy in a substance. |
Environmental Contaminant
|
All material and energy present in and around an operating system, such as
dust, air moisture, chemicals, and thermal energy. |
Evaporation
|
The escape
of water molecules from a liquid to the gas phase at the surface of a body
of water. |
Evaporator
|
The chamber located on the suction side of cap tube in which Freon is
evaporated to cause cooling in a refrigeration system. |
Exhauster
|
A term sometimes applied to a compressor in which the inlet
pressure is less than atmospheric pressure.
|
Exothermic
|
A term used to describe a chemical process in which heat is released. For
example, combustion is an exothermic process, because heat is released.
|
Expanders
|
Turbines or engines in which a gas expands, doing work, and
undergoing a drop in temperature. Use of the term usually implies that the
drop in temperature is the principle objective. The orifice in a
refrigeration system also performs this function, but the expander performs
it more nearly isentropically, and thus is more effective in cryogenic
systems. |
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